private void BeginExecuteCallBack(IAsyncResult result)
{
AsynchronousPop3ResponseContext cx = (AsynchronousPop3ResponseContext)result.AsyncState;
Boolean IsException = false;
try
{
Int32 size = this._Stream.EndRead(result);
if (cx.ReadBuffer(size) == true)
{
this._Stream.BeginRead(cx.Buffer.Array, 0, cx.Buffer.Array.Length, this.BeginExecuteCallBack, cx);
}
else
{
cx.OnEndGetResponse();
cx.Dispose();
}
}
catch
{
IsException = true;
throw;
}
finally
{
if (IsException == true && cx != null)
{
cx.Dispose();
}
}
}
public void BeginExecute(Pop3Command command, EndGetResponse callbackFunction)
{
AsynchronousContext cx = null;
Boolean IsResponseMultiLine = false;
Boolean IsException = false;
if (command is Top ||
command is Retr ||
command is List ||
command is Uidl)
{
IsResponseMultiLine = true;
}
try
{
cx = new AsynchronousPop3ResponseContext(_ResponseEncoding, IsResponseMultiLine, callbackFunction);
this.SendCommand(command.GetCommandString());
this._Stream.BeginRead(cx.Buffer.Array, 0, cx.Buffer.Array.Length, this.BeginExecuteCallBack, cx);
}
catch
{
IsException = true;
throw;
}
finally
{
if (IsException == true && cx != null)
{
cx.Dispose();
}
}
}
private void GetResponseCallback(IAsyncResult result)
{
AsynchronousPop3ResponseContext cx = null;
try
{
cx = (AsynchronousPop3ResponseContext)result.AsyncState;
if (this._TcpClient == null)
{
throw new Pop3ConnectException("Connection to POP3 server is closed");
}
Int32 size = _Stream.EndRead(result);
TimeSpan ts = DateTime.Now - cx.StartTime;
if (ts.TotalMilliseconds > this._ReceiveTimeout)
{
cx.Timeout = true;
_GetResponseDone.Set();
}
if (cx.ReadBuffer(size) == true)
{
_Stream.BeginRead(cx.Buffer.Array, 0, cx.Buffer.Array.Length, this.GetResponseCallback, cx);
}
else
{
_GetResponseDone.Set();
}
}
catch (Exception ex)
{
cx.Exception = ex;
}
if (cx.Exception != null)
{
try
{
_GetResponseDone.Set();
}
catch (ObjectDisposedException) { }
}
}
private void GetResponse(Stream stream, Boolean isMultiLine)
{
if (this._TcpClient == null)
{
throw new Pop3ConnectException("Connection to POP3 server is closed");
}
using (var cx = new AsynchronousPop3ResponseContext(_ResponseEncoding, isMultiLine))
{
_Stream.BeginRead(cx.Buffer.Array, 0, cx.Buffer.Array.Length, this.GetResponseCallback, cx);
var bl = _GetResponseDone.WaitOne(_ReceiveTimeout);
if (cx.Exception != null)
{
throw cx.Exception;
}
if (cx.Timeout == true || bl == false)
{
throw new Pop3ReceiveException("Response timeout");
}
this.ReadText(stream, isMultiLine, cx.Data.ToArray());
}
this._Commnicating = false;
}
